Hay-stacker.



No. 744,932. PATENTE'D NOV. 24, 1903;

J. 0. MQGORKLE.

HAY STAGKER.

APPLICATION FILED JUNE 8, 1903.

NO MODEL. 2 SHEETS-SHEET 1Q iii No. 744,932. PATENTED NOV. 24. 1903. J. 0. MoGORKLE.

HAY STAOKER.

APPLICATION FILED JUNE 8, 1903. N0 MODEL. 2 BHEETS-SHEET 2 I Unrrnn rarns Patented November 24, 17903.

PATENT @rrrcn.

JOHN C. MOCORKLEOF ALLIANCE, NEBRASKA, ASSIGNOR OF ONE-HALF TO J. R. PHELAN, OF ALLIANCE, NEBRASKA.

HAY STACKER.

EIPECIFIUATION forming part of Letters Patent No. 744,932, dated November 24, 1903.

Application filed June 8, 1903. Eaerial No. 160.509. (No model.)

To all whom, it may concern.-

Be it known that 1, JOHN C. MCCORKLE, a citizen of the United States, residing at Alliance, in the county of Boxbutte and State of Nebraska, have invented a new and useful Hay-Stacker, of which the following is a specification.

My invention relates to hoisting machinery which is designed primarily for use in stack- :0 ing hay, but which may be employed also for other purposes, such as loading hay upon wagons and stacking or hoisting other materials, such as straw, the.

The invention is applicable principally to power-stackers-that is,those machines which are capable of raising and discharging a considerable weight of hay or other material at each operation and which therefore require the use of horses, a donkey-engine, electric motor, or other large output of power acting intermittently.

The principal objects of my invention are to increase the efficiency of machines designed forthe above purposes, thereby lesssuing the amount of power required in proportion to the load raised; to provide a machine in which the lifting force acting upon the load shall be-greatest at the start and diminish in intensity as the vertical speed of the load decreases; to diminish the distance, or walk when horses are employed, through which the power must act while producing a given efiect or pull upon the load, thereby both increasing the efficiency and decreasing the time required in recovery or backing up after each operation, and to simplify the construction and operation'of machines of this class.

Other objectswill more fully appear as I 4o proceed with the description of my invention.

In the accompanying drawings I have illus trated and shall describe below an embodiment of my invention in a practical machine; but it will be understood that many changes in the details of construction may be made and many modifications designed without departing from the spirit of the invention, and these, I wish it understood, fall strictly within the scope thereof.

In the drawings, Figure l is a view in perspective of my improved hay-stacker, the parts being in their initial position ready to receive a load to be elevated; and Fig. 2 is another view of the same in elevation, showing in whole lines the load-carrying fork in a partly-raised or intermediate position, its completelyraised or final position being shown in dotted lines.

Referring to the drawings, A is the base frame, which may be of any suitable con- 6o struction, but shown as composed of side strips Ct, end pieces a a, and strip a This frame, besides forming a base to support the remainder of the structure, constitutes a sledge for transporting the machine from place to place when the distances are not too great.

Near the enda. of the base-frame A a hoisting member Bis pivoted at b. Hoisting member B is composed of side arms 73, extending beyond the opposite end of the base-frame, Where cross-strips b b are attached, to which are secured two sets of tines b 6 constituting a load-carrying receptacle or large fork.

Pivoted to the base-frame A at Z2 near the 75 end a I provide a tilting arm G, which in this instance is I i-shaped and provided with a stop-bar 0, attached thereto and carried thereby, and has also pivot-openings c at its upper end. The stop-bar c is so placed and adjusted that when arm C is tilted to bring said pivot-openings c in approximate vertical alinement with the load-carrying receptacle it will rest upon cross-piece a and prevent further downward movement in that direction. The positions of the pivots b and b upon the base-frame are such that in the operation of the machine it is not necessary to stake down the base-frame.

In orderto obtainapowerfulinitialleverage upon the load when the load is at rest and the team is about to start, as well as to obtain a diminishing pull thereon, I provide an extension-lever D, which in its construction and arrangement in combination with the other 93 elements of the machine constitutes the principal feature of my invention. This extension-lever D is preferably a simple bar centrally pivoted at c to the tilting arm 0 and suitably trussed, as by rod (Z. One end, cl, of I00 extension-lever D is connected to hoistingframe B at b by rods or wires while to the other end, (1 is secured suitable hoistingtackle, such as the rope E, passing through blocks 6 6 upon the base-frame. The block 6 is preferably mounted upon strip a of the base-frame between pivot bof the hoisting member and pivot b of the tilting arm, so that the pull of hoisting-rope E upon extension-lever D is exerted from a point upon the base-frame intermediate said pivots. The position of this point may be adjusted so as to be nearer to or farther from the end of base-frame B, as found desirable. A guy rope F, attached to the fork end of the baseframe and hoisting member,limits the upward movement of said hoisting member at the end of the hoist.

The operation of the device is as follows: The parts being in the position shown in Fig. 1, hay is loaded upon the receptacle or fork. As hoisting-frame B is pivoted at b, the load when raised will describe an arc of a circle with l) as a center, and hence in its initial or horizontal position a greater amount of power will be required to raise it than at any other point in its travel. To meet this requirement, the extension-lever D in its initial position is in substantially vertical alinement with the load, practically one-half of its length being added to the effective length of the tilting arm 0. The latter being braced by stop-bar 0, when the pull on hoisting-rope E is begun the extension-lever D is rocked upon its pivot and the load started upward before said stop a is moved from its rest. Continuing the pull, tiltingarm C also starts in the same direction, and we have a compound le-' veracting upon the hoisting member, which constantly diminishes the intensity of power applied to the load as the latter approaches the perpendicular over pivot 19. When the load is about half raised, the positions of the ends of extension-lever D are reversed with respect to the path of movement of its pivot, the end (1 being up and end 01 being down, so that the power is applied to the compound lever below the pivot at the end of tilting arm 0, resulting in further diminution in intensity of power and increased velocity of movement of the load. The diminution of intensity of power applied to lift the load thus corresponds with the diminishing efiective weight of the load, owing to the oblique positions of the hoisting member, and is gradual. When the hoisting member approaches the position shown in dotted lines in Fig. 2, it will be observed that the then lower end of extension-lever D has passed forward of the pivot of hoisting member B, so that considerable power with small expenditure of energy is still exerted on the load, and when the final position is reached, as shown in said figure, the hay is discharged upon the stack, which is formed close to the machine, there being practically no projection of parts in this position to interfere with such formation. After discharge of the load the hoistrope E is slacked, and the hoisting member B returns of its own weight to its initial position, thereby avoiding the necessity for employment ofa weight in connection with guyrope F and consequent loss of power, as in other machines.

With my arrangement of mechanism as above described multiplying tackle is unnecessary, and I am enabled to attach the hoist-rope directly to the end of extensionlever D, so that the drive for the horses with my machine is equivalent to the height of the stacker. The efficiency also is such that hay may be elevated with less or an equal number of pounds draft than its Weight.

The elements of the machine are reduced to their simplest form, so that the materials for constructing and repairing may be obtained from any lumber-yard and local hardware store.

Having described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. The combination with a base-frame, of a hoisting memberpivotally mounted near one end thereof and provided with aload-carrying receptacle, a tilting arm pivotally mounted near the other end of said base-frame, an extension-lever centrally pivoted to the free end of said tilting arm and in approximate vertical alinement with said load-carrying receptacle when the parts are in initial position, means to connect one end of said extension-lever to said hoisting member, and hoisting-tackle attached to the other end of said extension-lever, substantially as described.

2. The combination with a base-frame, of a hoisting member pivotally mounted near one end thereof and provided with a load-carrying receptacle, a tilting arm pivoted near the other end of said base-frame, a stop attached to and carried by said tilting arm, an extension-lever pivoted to the free end of said tilting arm, means to connect one end of said extension-lever to said hoisting member adjacent said load-carrying receptacle, and hoisting-tackle attached to the other end of said extension-lever, substantially as described.

3. The combination with a base-frame, of a hoisting member pivotally mounted near one end thereof, a tilting arm pivoted near the other end of said base-frame, an extensionlever pivoted to the free end of said tilting arm, means to connect one end of said extension-lever to said hoisting member, and tackle secured to the other end of said extension-lever and passing through a block on said base-frame located between the hoistingmember and tilting-arm pivots, whereby power applied to said tackle exerts a force upon said hoisting member greatest at the start and diminishing in ratio with the edective weight of the load.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN C. MCCORKLE.

Witnesses:

F. W. HARRIS, F. A. HIVELY. 

